/* ============================================
   FBAS Astronomy - Complete Stylesheet
   ============================================ */
   @import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@300;400;500;600;700;800;900&display=swap');

   :root {
       --bg-deep: #060b14;
       --bg-primary: #0a0f1e;
       --bg-secondary: #111827;
       --bg-card: #1a1f2e;
       --bg-glass: rgba(17, 24, 39, 0.8);
       --text-primary: #e2e8f0;
       --text-secondary: #94a3b8;
       --text-muted: #64748b;
       --accent: #6366f1;
       --accent-light: #818cf8;
       --accent-dark: #4f46e5;
       --accent-glow: rgba(99, 102, 241, 0.4);
       --red: #ef4444;
       --green: #10b981;
       --gold: #f59e0b;
       --border: #2d3748;
       --radius-sm: 0.5rem;
       --radius-md: 0.75rem;
       --radius-lg: 1rem;
       --radius-xl: 1.5rem;
       --radius-2xl: 2rem;
       --transition: all 0.3s ease;
       --shadow-lg: 0 10px 40px rgba(0,0,0,0.5);
   }
   
   * { margin: 0; padding: 0; box-sizing: border-box; }
   
   body {
       font-family: 'Vazirmatn', sans-serif;
       background: var(--bg-deep);
       color: var(--text-primary);
       min-height: 100vh;
       line-height: 1.7;
   }
   
   .star-canvas {
       position: fixed;
       top: 0; left: 0;
       width: 100%; height: 100%;
       pointer-events: none;
       z-index: 0;
   }
   
   .main-container {
       position: relative;
       z-index: 10;
       max-width: 1400px;
       margin: 0 auto;
       padding: 2rem;
   }
   
   .glass-morphism {
       background: rgba(17, 24, 39, 0.75);
       backdrop-filter: blur(20px);
       border: 1px solid rgba(255,255,255,0.1);
       box-shadow: 0 8px 32px rgba(0,0,0,0.3);
   }
   
   /* Header */
   .header {
       border-radius: var(--radius-2xl);
       padding: 2rem 2.5rem;
       margin-bottom: 2rem;
       position: relative;
       overflow: hidden;
   }
   .header-content {
       display: flex;
       justify-content: space-between;
       align-items: center;
       gap: 2rem;
       flex-wrap: wrap;
   }
   .logo-section {
       display: flex;
       align-items: center;
       gap: 1.5rem;
       flex: 1;
   }
   .logo-wrapper {
       position: relative;
       width: 70px; height: 70px;
       flex-shrink: 0;
   }
   .logo-orbit { position: relative; width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; }
   .orbit-ring {
       position: absolute;
       width: 100%; height: 100%;
       border: 2px solid rgba(99,102,241,0.3);
       border-radius: 50%;
       animation: orbit 10s linear infinite;
   }
   .orbit-ring-2 {
       width: 115%; height: 115%;
       border-color: rgba(139,92,246,0.2);
       animation-duration: 15s;
       animation-direction: reverse;
   }
   @keyframes orbit { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
   .logo-icon {
       width: 55px; height: 55px;
       background: linear-gradient(135deg, var(--accent), #8b5cf6);
       border-radius: 18px;
       display: flex;
       align-items: center;
       justify-content: center;
       font-size: 1.5rem;
       color: white;
       box-shadow: 0 0 30px var(--accent-glow);
       position: relative;
       z-index: 2;
       animation: float 4s ease-in-out infinite;
   }
   @keyframes float {
       0%, 100% { transform: translateY(0); }
       50% { transform: translateY(-8px); }
   }
   .main-title { font-size: 1.8rem; font-weight: 900; }
   .title-gradient {
       background: linear-gradient(135deg, #e2e8f0 0%, #818cf8 50%, #a78bfa 100%);
       -webkit-background-clip: text;
       -webkit-text-fill-color: transparent;
   }
   .subtitle { color: var(--text-secondary); font-size: 0.9rem; margin: 0.3rem 0 0.6rem; }
   .header-tags { display: flex; gap: 0.5rem; flex-wrap: wrap; }
   .badge {
       padding: 0.4rem 1rem;
       border-radius: 3rem;
       font-size: 0.78rem;
       font-weight: 600;
       display: inline-flex;
       align-items: center;
       gap: 0.4rem;
   }
   .badge-primary { background: rgba(99,102,241,0.2); color: #a5b4fc; border: 1px solid rgba(99,102,241,0.3); }
   .badge-secondary { background: rgba(245,158,11,0.2); color: #fbbf24; border: 1px solid rgba(245,158,11,0.3); }
   .header-stats { display: flex; gap: 1rem; }
   .stat-card-mini {
       background: rgba(255,255,255,0.03);
       border: 1px solid var(--border);
       border-radius: var(--radius-lg);
       padding: 1rem 1.5rem;
       text-align: center;
       min-width: 100px;
       transition: var(--transition);
   }
   .stat-card-mini:hover { border-color: var(--accent); transform: translateY(-2px); }
   .stat-number {
       font-size: 1.8rem;
       font-weight: 800;
       background: linear-gradient(135deg, var(--accent-light), #8b5cf6);
       -webkit-background-clip: text;
       -webkit-text-fill-color: transparent;
   }
   .stat-label { font-size: 0.75rem; color: var(--text-secondary); margin-top: 0.2rem; }
   .nav-links { display: flex; gap: 0.8rem; }
   .nav-link {
       padding: 0.6rem 1.2rem;
       border-radius: var(--radius-md);
       color: var(--text-secondary);
       text-decoration: none;
       font-weight: 600;
       font-size: 0.9rem;
       transition: var(--transition);
       border: 1px solid transparent;
       display: flex;
       align-items: center;
       gap: 0.5rem;
   }
   .nav-link:hover { color: var(--text-primary); border-color: var(--border); }
   .nav-link.active { background: var(--accent); color: white; border-color: var(--accent); }
   .header-decoration { display: flex; align-items: center; gap: 1rem; margin-top: 1.5rem; }
   .decoration-line { flex: 1; height: 2px; background: linear-gradient(to right, transparent, var(--accent), transparent); }
   .decoration-dot {
       width: 8px; height: 8px;
       background: var(--accent);
       border-radius: 50%;
       box-shadow: 0 0 15px var(--accent-glow);
       animation: pulse 2s ease-in-out infinite;
   }
   @keyframes pulse {
       0%, 100% { opacity: 0.5; transform: scale(1); }
       50% { opacity: 1; transform: scale(1.5); }
   }
   
   /* Buttons */
   .btn {
       padding: 0.7rem 1.4rem;
       border-radius: var(--radius-md);
       font-family: 'Vazirmatn', sans-serif;
       font-weight: 600;
       font-size: 0.9rem;
       cursor: pointer;
       transition: var(--transition);
       border: 1px solid transparent;
       display: inline-flex;
       align-items: center;
       gap: 0.5rem;
       text-decoration: none;
   }
   .btn-primary { background: var(--accent); color: white; }
   .btn-primary:hover { background: var(--accent-dark); box-shadow: 0 0 25px var(--accent-glow); }
   .btn-secondary { background: transparent; color: var(--text-secondary); border-color: var(--border); }
   .btn-secondary:hover { border-color: var(--accent); color: var(--text-primary); }
   .btn-danger { background: var(--red); color: white; }
   .btn-danger:hover { background: #dc2626; }
   .btn-warning { background: #f97316; color: white; }
   .btn-warning:hover { background: #ea580c; }
   .btn-reset { background: rgba(239,68,68,0.15); color: #f87171; border-color: rgba(239,68,68,0.3); }
   .btn-lg { padding: 0.9rem 2rem; font-size: 1rem; }
   .btn-icon { width: 38px; height: 38px; padding: 0; justify-content: center; }
   
   /* Filter Section */
   .filter-section { border-radius: var(--radius-2xl); padding: 1.8rem; margin-bottom: 1.5rem; }
   .filter-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.2rem; flex-wrap: wrap; gap: 1rem; }
   .filter-title { display: flex; align-items: center; gap: 0.8rem; }
   .filter-title h2 { font-size: 1.2rem; font-weight: 700; }
   .filter-icon-pulse { color: var(--accent-light); animation: pulse 2s ease-in-out infinite; }
   .filter-body { display: flex; flex-direction: column; gap: 1rem; }
   .filter-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
   .filter-group { display: flex; flex-direction: column; gap: 0.4rem; }
   .filter-label { font-size: 0.82rem; color: var(--text-secondary); font-weight: 600; display: flex; align-items: center; gap: 0.4rem; }
   .filter-select, .filter-input, .form-input, .form-select, .form-textarea {
       background: var(--bg-card);
       color: var(--text-primary);
       border: 2px solid var(--border);
       padding: 0.75rem 1rem;
       border-radius: var(--radius-md);
       font-family: 'Vazirmatn', sans-serif;
       font-size: 0.88rem;
       transition: var(--transition);
       outline: none;
       width: 100%;
   }
   .filter-select { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: left 1rem center; padding-left: 2.5rem; }
   .form-textarea { resize: vertical; min-height: 100px; line-height: 1.8; }
   .filter-select:focus, .filter-input:focus, .form-input:focus, .form-select:focus, .form-textarea:focus {
       border-color: var(--accent-light);
       box-shadow: 0 0 0 4px var(--accent-glow);
   }
   .search-input-wrapper { position: relative; }
   .search-input { padding-right: 2.8rem; }
   .search-icon { position: absolute; right: 1rem; top: 50%; transform: translateY(-50%); color: var(--text-muted); pointer-events: none; }
   .quick-filter-buttons { display: flex; gap: 0.5rem; flex-wrap: wrap; }
   .quick-filter-btn {
       padding: 0.5rem 1rem;
       border-radius: 3rem;
       font-family: 'Vazirmatn', sans-serif;
       font-size: 0.8rem;
       font-weight: 600;
       cursor: pointer;
       transition: var(--transition);
       background: rgba(255,255,255,0.03);
       border: 1px solid var(--border);
       color: var(--text-secondary);
   }
   .quick-filter-btn:hover { border-color: var(--accent); color: var(--text-primary); }
   .quick-filter-btn.active { background: var(--accent); color: white; border-color: var(--accent); }
   
   /* Results Bar */
   .results-bar {
       background: rgba(26,31,46,0.6);
       backdrop-filter: blur(10px);
       border: 1px solid var(--border);
       border-radius: var(--radius-lg);
       padding: 0.8rem 1.5rem;
       margin-bottom: 1.5rem;
   }
   .results-info { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
   .results-count { color: var(--text-secondary); font-size: 0.88rem; }
   .results-count strong { color: var(--accent-light); }
   .results-sort { display: flex; align-items: center; gap: 0.5rem; font-size: 0.85rem; color: var(--text-secondary); }
   .sort-select {
       background: var(--bg-card);
       color: var(--text-primary);
       border: 1px solid var(--border);
       padding: 0.4rem 0.8rem;
       border-radius: var(--radius-sm);
       font-family: 'Vazirmatn', sans-serif;
       font-size: 0.85rem;
       cursor: pointer;
   }
   
   /* Projects Grid */
   .projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(380px, 1fr)); gap: 1.8rem; }
   .project-card {
       background: var(--bg-glass);
       border: 1px solid var(--border);
       border-radius: var(--radius-xl);
       overflow: hidden;
       transition: var(--transition);
       cursor: pointer;
   }
   .project-card:hover {
       transform: translateY(-8px);
       box-shadow: 0 20px 50px rgba(0,0,0,0.5), 0 0 0 2px var(--accent);
       border-color: var(--accent);
   }
   .card-header { padding: 1.5rem 1.8rem; display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; }
   .project-icon { width: 50px; height: 50px; border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; flex-shrink: 0; }
   .icon-observation { background: rgba(59,130,246,0.2); color: #60a5fa; }
   .icon-research { background: rgba(139,92,246,0.2); color: #a78bfa; }
   .icon-astro { background: rgba(236,72,153,0.2); color: #f472b6; }
   .icon-workshop { background: rgba(16,185,129,0.2); color: #34d399; }
   .icon-presentation { background: rgba(245,158,11,0.2); color: #fbbf24; }
   .icon-analysis { background: rgba(6,182,212,0.2); color: #22d3ee; }
   .card-tags { display: flex; gap: 0.4rem; flex-wrap: wrap; }
   .tag { padding: 0.25rem 0.7rem; border-radius: 3rem; font-size: 0.7rem; font-weight: 700; }
   .tag-category { background: rgba(99,102,241,0.2); color: #a5b4fc; border: 1px solid rgba(99,102,241,0.3); }
   .tag-date { background: rgba(148,163,184,0.15); color: #cbd5e1; border: 1px solid rgba(148,163,184,0.3); }
   .tag-review { background: rgba(245,158,11,0.2); color: #fbbf24; }
   .card-body { padding: 1.5rem 1.8rem; flex-grow: 1; }
   .card-body h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 0.7rem; }
   .card-body .description { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.9; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
   .card-meta { display: flex; gap: 1rem; margin-top: 1rem; font-size: 0.78rem; color: var(--text-muted); }
   .card-footer { padding: 1.2rem 1.8rem; border-top: 1px solid rgba(255,255,255,0.05); display: flex; justify-content: space-between; align-items: center; background: rgba(0,0,0,0.2); }
   .btn-card {
       background: transparent;
       border: 1px solid var(--border);
       color: var(--text-primary);
       padding: 0.5rem 1rem;
       border-radius: var(--radius-md);
       font-family: 'Vazirmatn', sans-serif;
       font-size: 0.82rem;
       cursor: pointer;
       transition: var(--transition);
   }
   .btn-card:hover { background: var(--accent); border-color: var(--accent); color: white; }
   
   /* Admin Panel */
   .admin-container { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; margin-bottom: 2rem; }
   .admin-section { border-radius: var(--radius-2xl); padding: 2rem; }
   .admin-section h2 { font-size: 1.3rem; font-weight: 700; margin-bottom: 1.5rem; display: flex; align-items: center; gap: 0.8rem; }
   .form-grid { display: grid; gap: 1.2rem; }
   .form-group { display: flex; flex-direction: column; gap: 0.4rem; }
   .form-group.full-width { grid-column: 1 / -1; }
   .required { color: var(--red); }
   .projects-table-wrapper { overflow-x: auto; }
   .projects-table { width: 100%; border-collapse: collapse; }
   .projects-table th, .projects-table td { padding: 0.8rem 1rem; text-align: right; border-bottom: 1px solid var(--border); font-size: 0.85rem; }
   .projects-table th { background: rgba(0,0,0,0.3); color: var(--text-secondary); font-weight: 700; }
   .projects-table tbody tr:hover { background: rgba(99,102,241,0.05); }
   .table-actions { display: flex; gap: 0.4rem; }
   
   /* Modal */
   .modal-overlay {
       position: fixed;
       top: 0; left: 0;
       width: 100%; height: 100%;
       background: rgba(0,0,0,0.85);
       backdrop-filter: blur(15px);
       z-index: 1000;
       display: flex;
       align-items: center;
       justify-content: center;
       padding: 2rem;
       opacity: 0;
       visibility: hidden;
       transition: var(--transition);
   }
   .modal-overlay.active { opacity: 1; visibility: visible; }
   .modal-container {
       background: var(--bg-secondary);
       border: 1px solid var(--border);
       border-radius: var(--radius-2xl);
       max-width: 700px;
       width: 100%;
       max-height: 85vh;
       overflow-y: auto;
       transform: translateY(30px);
       transition: var(--transition);
   }
   .modal-overlay.active .modal-container { transform: translateY(0); }
   .modal-header { padding: 1.8rem; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: flex-start; position: sticky; top: 0; background: var(--bg-secondary); z-index: 2; }
   .modal-badge { padding: 0.25rem 0.7rem; border-radius: 3rem; font-size: 0.73rem; font-weight: 700; background: rgba(99,102,241,0.2); color: #a5b4fc; margin-bottom: 0.6rem; display: inline-block; }
   .modal-title { font-size: 1.4rem; font-weight: 800; }
   .modal-close-btn {
       background: rgba(255,255,255,0.05);
       border: 1px solid var(--border);
       color: white;
       width: 40px; height: 40px;
       border-radius: 50%;
       cursor: pointer;
       transition: var(--transition);
       display: flex;
       align-items: center;
       justify-content: center;
   }
   .modal-close-btn:hover { background: var(--red); border-color: var(--red); transform: rotate(90deg); }
   .modal-body { padding: 1.8rem; }
   .modal-footer { padding: 1.5rem 1.8rem; border-top: 1px solid var(--border); display: flex; gap: 1rem; justify-content: flex-end; position: sticky; bottom: 0; background: var(--bg-secondary); }
   
   /* Toast */
   .toast-container { position: fixed; bottom: 2rem; left: 2rem; z-index: 1100; display: flex; flex-direction: column; gap: 0.8rem; }
   .toast {
       background: var(--bg-card);
       border: 1px solid var(--border);
       border-radius: var(--radius-lg);
       padding: 1rem 1.5rem;
       display: flex;
       align-items: center;
       gap: 0.8rem;
       box-shadow: var(--shadow-lg);
       animation: slideIn 0.4s ease, slideOut 0.4s ease 3s forwards;
       color: var(--text-primary);
   }
   .toast.success { border-right: 4px solid var(--green); }
   .toast.error { border-right: 4px solid var(--red); }
   @keyframes slideIn { from { transform: translateX(120%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
   @keyframes slideOut { from { transform: translateX(0); opacity: 1; } to { transform: translateX(120%); opacity: 0; } }
   
   /* Empty State */
   .empty-state {
       text-align: center;
       padding: 4rem 2rem;
       background: rgba(26,31,46,0.5);
       border-radius: var(--radius-2xl);
       border: 2px dashed var(--border);
       grid-column: 1 / -1;
   }
   .empty-state-icon { font-size: 3.5rem; color: var(--accent-light); opacity: 0.5; margin-bottom: 1.2rem; }
   .empty-state h3 { font-size: 1.3rem; margin-bottom: 0.6rem; }
   .empty-state p { color: var(--text-secondary); }
   
   /* Responsive */
   @media (max-width: 768px) {
       .main-container { padding: 1rem; }
       .header { padding: 1.5rem; }
       .header-content { flex-direction: column; text-align: center; }
       .logo-section { flex-direction: column; }
       .projects-grid { grid-template-columns: 1fr; }
       .admin-container { grid-template-columns: 1fr; }
       .filter-row { grid-template-columns: 1fr; }
       .modal-overlay { padding: 1rem; }
   }
   
   ::-webkit-scrollbar { width: 8px; }
   ::-webkit-scrollbar-track { background: var(--bg-primary); }
   ::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; }
   ::-webkit-scrollbar-thumb:hover { background: var(--accent); }

   /* ============================================
   FILE UPLOAD STYLES
   ============================================ */

.file-upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.02);
    position: relative;
}

.file-upload-area:hover,
.file-upload-area.drag-over {
    border-color: var(--accent);
    background: rgba(99, 102, 241, 0.05);
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.1);
}

.file-upload-area i {
    display: block;
    margin-bottom: 0.8rem;
}

.file-upload-area p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border);
    border-radius: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    border-radius: 10px;
    transition: width 0.3s ease;
    width: 0%;
}

/* File List */
.file-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.file-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0.8rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition);
    animation: fadeIn 0.3s ease;
}

.file-item:hover {
    border-color: var(--accent);
}

.file-info {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    flex: 1;
    overflow: hidden;
}

.file-info i {
    font-size: 1.3rem;
    flex-shrink: 0;
}

.file-info .pdf { color: #ef4444; }
.file-info .word { color: #3b82f6; }
.file-info .excel { color: #10b981; }
.file-info .powerpoint { color: #f59e0b; }
.file-info .image { color: #ec4899; }
.file-info .video { color: #8b5cf6; }
.file-info .code { color: #06b6d4; }
.file-info .archive { color: #6b7280; }
.file-info .default { color: var(--accent-light); }

.file-name {
    color: var(--text-primary);
    font-size: 0.85rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-size {
    color: var(--text-muted);
    font-size: 0.75rem;
    flex-shrink: 0;
}

.file-actions {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

.file-remove-btn {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
    width: 30px;
    height: 30px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.file-remove-btn:hover {
    background: rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

.file-download-btn {
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: #a5b4fc;
    width: 30px;
    height: 30px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.file-download-btn:hover {
    background: rgba(99, 102, 241, 0.3);
    color: #818cf8;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}